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OSBM Bolt: Tetney Lock 
OSBM Bolt on N end, E side of Tetney Lock [3GL] - Bolt reported destroyed.
Location
Grid reference: TA 3417 0233.
Landranger 113: Grimsby, Louth & Market Rasen.
Structure: Other.
Waypoint: OS0098.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Patrington,
20.33km to the north.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Boston to Immingham levelling line. The surveyor's description was OSBM Bolt on N end, E side of Tetney Lock [destroyed].
Location
Grid reference: TA 3417 0233.
Landranger 113: Grimsby, Louth & Market Rasen.
Structure: Other.
Waypoint: OS0098.
Neighbouring Flush Brackets
| S8477 | North Cotes, Church 1.90km to the southeast. |
| G4700 | Humberston Road 2.85km to the west. |
| S0589 | Tetney, Plough Inn 2.98km to the southwest. |
| G4717 | Tetney, School 3.15km to the southwest. |
| G4699 | Marshchapel 3.60km to the southeast. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Boston to Immingham levelling line. The surveyor's description was OSBM Bolt on N end, E side of Tetney Lock [destroyed].
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